Esr study of the guanine cation

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August undefined, 2024

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ESR study of the guanine cation INIS

WebFeb 21, 2008 · In this report, we present electron spin resonance (ESR) and theoretical (DFT) evidence regarding the formation of sugar radicals after photoexcitation of guanine cation radical (G*+) in frozen aqueous solutions of one-electron-oxidized RNA model compounds (nucleosides, nucleotides and oligomers) at 143 K. Specific sugar radicals … WebAug 31, 1998 · Previous ESR studies of x‐irradiated single crystals of 2’‐deoxyguanosine‐5’‐monophosphate have indicated the presence of a radical thought to be formed by deprotonation of a primary base cation at... ESR and ENDOR study of the guanine cation: Secondary product in 5’‐dGMP: The Journal of Chemical Physics: Vol … the city burgess

Proton hyperfine structure in the ESR. Delta. M sub s = +2 …

WebOct 27, 1998 · The geometries, spin density distributions, and hyperfine coupling constants (HFCC) in possible radiation products of guanine are studied through the use of density functional theory. Numerous hydrogenated, dehydrogenated, and hydroxylated radicals are examined and the coupling constants are compared to those obtained from detailed … WebU.S. Department of Energy Office of Scientific and Technical Information. Search terms: Advanced search options. ... WebJul 24, 2014 · In the current study, we have investigated prehydrated electron attachment to methyl acetoacetate (MAA) in homogeneous aqueous (H 2 O or D 2 O) glasses at 77 K and followed the subsequent reactions of the MAA anion radical in the 77 to ca. 170 K temperature range employing electron spin resonance (ESR) spectroscopy and density … taxi service rutland vt

Structure and acid-base properties of one-electron-oxidized ...

ESR and ENDOR study of the guanine cation: Secondary product …

WebMay 1, 2002 · Ab Initio Study of Guanine Damage by Hydroxyl Radical. ... Effect of Base Stacking on the Acid−Base Properties of the Adenine Cation Radical [A•+] in Solution: ESR and DFT Studies. Journal of the American Chemical Society 2008, 130 (31) , 10282-10292. DOI: 10.1021/ja802122s. ... The Guanine Cation Radical: Investigation of Deprotonation ... WebFeb 22, 1990 · A parallel-polarized ESR study Full Record Related Research Abstract The effects of deprotonation on the spin distribution of 1-naphthol (1-ROH) in the lowest … taxi service royal oak michiganWebESR is often higher than normal in people with an autoimmune disorder. Common autoimmune disorders include: Lupus; Polymyalgia rheumatica; Rheumatoid arthritis in … taxi service rockland maine

"WebESR: Abbreviation for erythrocyte sedimentation rate, a blood test that detects and monitors inflammation in the body. It measures the rate at which red blood cells (RBCs) in a test … " - Esr study of the guanine cation

Esr study of the guanine cation

WebThe present study determines the role of TiO2- NP (anatase, ∅ < 100 nm) using several parameters such as cyto- and genotoxicity, DNA-adduct formation and generation of free radicals following its uptake by human lung cells in vitro. For comparison, iron containing nanoparticles (hematite, Fe2O3, ∅ < 100 nm) were used. WebNov 4, 2006 · Using ESR and UV−visible spectroscopy, one-electron oxidized guanine is investigated in frozen aqueous D 2 O solutions of 2‘-deoxyguanosine (dGuo) at …

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WebIt has been proposed that the primary direct radiation damage products in DNA are guanine cations and thymine anions. Experiments reported here characterize a guanine cation … WebJul 1, 1992 · ESR-study of the guanine cation. J. Chem. Phys. (1985) D.M. Close et al. Radical formation in X-irradiated single crystals of guanine hydrochloride monohydrate. …

WebJul 1, 1992 · For four different tautomers of the guanosyl radical cation theoretical spin densities and calibration curves were used to obtain coupling constants. They were applied in a simulation of the experimental EPR-spectrum. Webprotonated anion or a deprotonated cation located in the six-member ring of the guanine base. INTRODUCTION Knowledge of radiation damage in DNA is of primary importance for under-standing the radiation effects in biological systems. Considerable work has been done, primarily with electron spin resonance (ESR), to elucidate the radiation-

WebThe U.S. Department of Energy's Office of Scientific and Technical Information WebIt has been proposed that the primary direct radiation damage products in DNA are guanine cations and thymine anions. Experiments reported here characterize a guanine cation …

WebJun 28, 2008 · In basic conditions both the adenine and thymine π-cations are observed in TpdA. In both neutral and basic conditions the results found for mixed dinucleoside phosphates containing guanine show...

WebJun 4, 1998 · It has been proposed that the primary direct radiation damage products in DNA are guanine cations and thymine anions. Experiments reported here characterize a guanine cation observed in a single crystal of guanine:HCl:H 2 O. ESR experiments … the city church huntersvilleWebstudy.1 According to their interpretation of the TRRR result, G 7 ... favored site of protonation in the guanine cation radical is at N1, not N7. In summary, the discussions presented above of Raman C−O ... Cation Radical: Investigation of Deprotonation States by ESR and DFT. J. Phys. Chem. B 2006, 110, 24171−24180. the city church lubbockWebMar 2, 2016 · The Guanine Cation Radical: Investigation of Deprotonation States by ESR and DFT J. Phys. Chem. B 2006, 110, 24171– 24180 DOI: 10.1021/jp064361y [ ACS Full Text ], [ CAS ], Google Scholar 7 Tripathi, G. N. R.; Schuler, R. H. The resonance Raman spectrum of phenoxyl radical J. Chem. Phys. 1984, 81, 113– 121 DOI: 10.1063/1.447373 the city church huntersville ncWebRecently the cation of guanine was identified in single crystals of guanine hydrochloride monohydrate (7) by ESR spectroscopy and was shown to exhibit an electronic structure in close agreement with that postulated from DNA-oriented studies (3, 4). Few single-crystal studies of irradiated guanine derivatives have appeared. Most of taxi services abergavennyWebDOI: 10.1016/J.ELECTACTA.2024.06.052 Corpus ID: 197161674; Oxidation potentials of guanine, guanosine and guanosine-5′-monophosphate: Theory and experiment @article{Lika2024OxidationPO, title={Oxidation potentials of guanine, guanosine and guanosine-5′-monophosphate: Theory and experiment}, author={Alan Li{\vs}ka and Iveta … the city church batavia nyWebJul 1, 1974 · An ESR study of the relative distribution of ion radicals formed in DNA equilibrated with DâO and Î³-irradiated at 77 K is presented. ... and they strongly favor the guanine cation over the ... taxi service sag harbor nyWebAug 31, 1998 · Previous ESR studies of x‐irradiated single crystals of 2 ’ ‐deoxyguanosine‐5 ’ ‐monophosphate have indicated the presence of a radical thought to be formed by … the city church management